TAN(X)
SIN(X)/COS(x)
COT(X)
COS(X)/SIN(X)
SEC(X)
1/COS(X)
CSC(X)
1/SIN(X)
ARCSIN(X)
ATN (X/SQR(1-X*X)
ARCCOS(X)
pi/2-ATN(X/SQR(1-X*X)
ARCCOT(X)
pi/2-ATN(X)
ARCSEC(X)
ATN(SQR(X*X-1))-(X<0)*pi
ARCCSEC(X)
ATN(1/SQR(X*X-1))-(X<0)*pi